Improvement in quartz-crushers



M. B. DODGE. w

- Ore Mill.

No. 54,512. Patented May 8, I866.

Inventon AM. FHOTO'LITHQCQNX. [OSBORNE'S PROCESS) UNITED STATES M. B. DODGE, OF NEW YORK, N. Y.

IMPROVEMENT IN QUARTZ-CRUSHERS.

Specification forming part of Letters Patent No. 54,5 12, dated May 8, 1866.

county, and State of New York, have invented a new and useful Improvement in Crushing- Rollers; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being bad to the accompanying drawings, forming part of this specification, in which Figure 1 represents a sectional side elevation of this invention. Fig. 2 is a plan or top view of the same.

Similar letters of reference indicate corresponding parts.

This invention consists in the arrangement of adjustable wedges, or their equivalents, in combination'with the boxes of the crushingrollers, one or both of which are made adjustable in such a manner that by the action of said wedges the distance between the crushing-faces can be adjusted with the greatest nicety, and that all the pressure exerted by theset-screws bearing on the adjustable boxes of said crushing-rollers, and also the rebound of the springs acting on the backs of said adj ustable boxes, is sustained by the wedges, and thereby the crushing faces of the rollers are relieved from all unnecessary strain, rendering the same free in their motions and less liable to wear out than rollers of the ordinary construction.

A represents a frame, of cast-iron or any other suitable material, which forms the bearings forthe boxes B B, supporting the axles O O of the crushing-rollers. One pair ot'boxes, B, are stationary, and the other pair, B, are made adjustable by means of set-screws a, and between the set-screws and boxes pieces b of india-rubber or other elastic material are interposed to render at least one of the crushing-rod ers yielding, and allow it to give incase a piece of iron or other substance too hard to be crushed gets in between the crushing-faces of the rollers. The inner ends of the boxesB B are tapering, and wedges D are fitted in between them, as clearly shown in Fig. l of the drawings. These Wedges are made adjustable by set-screws d, and by forcing them down the crushing-faces of the rollers are set apart, whereas by raising them the crushing-races are allowed to close up. By these means the crushing-faces can be set as close as may be desirable without permitting them to bear against each other, all the strain of the setscrews a, and also the rebound of the springs 11, being sustained by the wedge-s D.

Instead of using wedges, set-screws might be passed through the boxes B and made to bear with the points on the boxes B, to keep the crushing-rollers at the proper distance apart, as seen in Fig. 3. This arrangement I consider a mechanical equivalent to the wedges.

By this arrangement the power required to drive the crushing-rollers is much reduced, and furthermore their crnshingfaces are prevented i'rom wearing out as quick as those of ordinary crushing rollers, and the rollers can be adjusted with the greatest accuracy, according to the fineness to which the material to be crushed is to be reduced.

What 1 claim as new, and desire to secure by Letters Patent, is

The combination of the Wedges D with the boxes B of crushingrollers, when arranged to limit the approach of said rollers, as herein described.

M. B. DODGE.

Witnesses v M. M. LIVINGSTON, W. HAUFF. 

